VSync and Pimax Crystal VR question

[Justin1Ntime]

I have Vsync turned off on my Nvidia control pannel settings and in DCS. I set my VR headset to 120Hz Refresh Rate and I am getting 90 or so FPS. I set my refresh rate to 72Hz and my FPS maxes out at 72-73. With Vsync turned off shouldn't my FPS be in the 90s when my RR is at 72? I get there will be screen tearing, but Vsync seems to be on even though I have it turned off in every place I can think of. 

[zildac]

I have Vsync turned off on my Nvidia control pannel settings and in DCS. I set my VR headset to 120Hz Refresh Rate and I am getting 90 or so FPS. I set my refresh rate to 72Hz and my FPS maxes out at 72-73. With Vsync turned off shouldn't my FPS be in the 90s when my RR is at 72? I get there will be screen tearing, but Vsync seems to be on even though I have it turned off in every place I can think of. 

It doesn't work like that in VR, and VSYNC in NVCpl has no effect as far as I'm aware. Are you able to achieve more than 90fps in VR? Perhaps that's rhe issue?

[Justin1Ntime]

zildac no I cant seem to break 90 but that's ok. What I was trying to do was have a 72Hz refresh rate and do more than 72 FPS. At this point it does not seem possible in VR.

For example, my computer monitor has a 60Hz refresh rate, and sometimes I am doing 120+ FPS in certain games. Unlike 2D gaming, It seems that in VR FPS is strictly tied to refresh rate. 

[zildac]

zildac no I cant seem to break 90 but that's ok. What I was trying to do was have a 72Hz refresh rate and do more than 72 FPS. At this point it does not seem possible in VR.
For example, my computer monitor has a 60Hz refresh rate, and sometimes I am doing 120+ FPS in certain games. Unlike 2D gaming, It seems that in VR FPS is strictly tied to refresh rate. 

Understood. With 72hz you will never exceed 72fps in the HMD

[Rufuz64]

Check your Max FPS in DCS

[Phantom711]

@Justin1Ntime

Be aware that the game will be smoothest when FPS match the refresh rate. So usually 72FPS at 72Hz will appear smoother than 90FPS at 120Hz.

And yes…as already stated, in VR your FPS can not exceed the headset‘s refresh rate.

[Kovacs]

Thanks Phamtom711, i tried with my PICO 4, 90 FPS and 90 Hz and it's great ! I didn't pay attention to this setting.

[Rufuz64]

For me, the performance is better if I set the Max FPS slightly higher than the refresh rate (72 Hz). We also recommend this in our workshops.

AMD Ryzen R7 5800X3D
Nvidia RTX 4090
64 GB RAM
Pimax Crystal QLED / 72 Hz / QV DFR

I have just tested it again:

RR 72 Hz / MaxFPS 72: The measurement results show higher deviations in the frametime and therefore poorer values for the low average fps. When I turn my head and look at the instruments, it stutters slightly.

RR 72 Hz / MaxFPS 90: (Back to my normal setting) Even frametime, better low average fps values. When I turn my head, there is no stuttering at the instruments.

Edited November 1, 2024 by Rufuz64